CN102301176A

CN102301176A - Illumination system with remote phosphor layer and/or scattering layer

Info

Publication number: CN102301176A
Application number: CN2010800057688A
Authority: CN
Inventors: G·A·R·范迪杰克; A·M·T·P·范德普坦; R·T·韦格; M·P·J·皮特斯; R·J·恩德里克斯
Original assignee: Koninklijke Philips Electronics NV
Current assignee: Koninklijke Philips NV; Signify Holding BV
Priority date: 2009-01-28
Filing date: 2010-01-21
Publication date: 2011-12-28
Anticipated expiration: 2030-01-21
Also published as: KR20110120297A; RU2011135842A; RU2539331C2; JP5850570B2; KR101727128B1; CN102301176B; WO2010086766A1; JP2012516534A; US20120020051A1; BRPI1005305A2; EP2391847A1; CA2751030A1; US9250470B2

Abstract

The invention relates to an illumination system (10,12), to a remote phosphor layer (30; 32, 34), to a scattering layer (32), to a luminaire (100), to a display device (300) and to a method of at least partially correcting a light emission characteristic of at least one light source (22) in the illumination system. The illumination system comprises an array of light sources (20) and a remote phosphor layer and/or a scattering layer arranged between the array of light sources and a light output window (40) for emitting the light from the light sources. At least one light source of the array of light sources comprises a light emission characteristic different from the other light sources of the array of light sources. The luminescent material (52, 54) is distributed across the remote phosphor layer and/or the scattering structures (52) and/or scattering material (52) are distributed across the scattering layer for compensating at least partially the difference in light emission characteristic of the at least one light source. The effect of the illumination system according to the invention is that the deviation of the at least one light source can be compensated, and as such, binning of light sources may be omitted.

Description

Illuminator with remote phosphor and/or scattering layer

Technical field

The present invention relates to a kind of illuminator, it comprises a plurality of light emitting sources and remote phosphor and/or scattering layer.

The invention still further relates to a kind of lighting apparatus that comprises this illuminator, relate to a kind of display device that comprises this illuminator, and relate to a kind of method of revising the characteristics of luminescence of at least one light source in this illuminator.

Background technology

Illuminator comprises a plurality of light sources and the remote phosphors layout that itself is known.They are used for the general illumination purposes especially in lighting apparatus, for example be used for office lighting, are used for shop illumination, perhaps for example are used for the general illumination purposes of family.These illuminators are also at back light system with comprise in the display device of back light system and using.

Remote phosphors is arranged the part of the light that comprises that the light source in the absorption array of source is launched and the light that is absorbed is converted to the luminescent material of the light of different colours.When luminescent material is arranged to when with one or more light sources certain distance being arranged, obtain so-called remote phosphors and arrange.Benefit when using remote-phosphor configuration is known, and comprises the conversion efficiency and life-span of having improved luminescent material and the scope of having improved alternative luminescent material.

This type of illuminator is for example learnt from patent application US 2006/0268537, wherein discloses the phosphor film with fluorescent characteristic.In the specific embodiment of this U. S. application, phosphor film is disclosed, it is arranged to three light sources being arranged away from walking abreast.In the zone that the concentration that phosphor material is disposed in phosphor microparticle wherein increases with the distance from light source center.Generally speaking, along with the increase of irradiates light, phosphor have higher wavelength conversion efficiency and more big figure through the convert light component.Therefore, by increasing, can generate uniform distribution of color away from the phosphor concentration in the part at light-source brightness center.

The defective of this known illumination system is that the uniformity of this illuminator may be still not enough.

Summary of the invention

The objective of the invention is further to improve the uniformity of illuminator.

According to a first aspect of the invention, utilize illuminator to realize this purpose according to claim 1.According to a second aspect of the invention, utilize remote phosphor according to claim 11 to realize this purpose.According to a third aspect of the invention we, utilize scattering layer according to claim 12 to realize this purpose.According to a forth aspect of the invention, utilize lighting apparatus according to claim 13 to realize this purpose.According to a fifth aspect of the invention, utilize display device according to claim 14 to realize this purpose.According to a sixth aspect of the invention, utilize the method for the characteristics of luminescence of at least one light source in the correction illuminator according to claim 15 to realize this purpose.

Comprise array of source and be arranged in array of source and be used to launch according to the illuminator of first aspect present invention from remote phosphor and/or scattering layer between the light output window of the light of light source,

At least one light source in the array of source comprises the characteristics of luminescence that is different from the other light sources in the array of source,

Remote phosphor and/or scattering layer are arranged to array of source certain distance, remote phosphor comprises that at least a portion that is arranged to light that light source is launched is converted to the luminescent material of the light of different colours, scattering layer comprises the diffusing structure and/or the scattering material of at least a portion that is arranged to the light that scattering light source launches, and luminescent material is striden remote phosphor and distribution and diffusing structure and/or scattering material are striden scattering layer and distributed so that compensate the difference of the characteristics of luminescence aspect of this at least one light source at least in part.

The characteristics of luminescence for example comprises the color of the light of being launched, and can comprise that perhaps the spatial color of light source changes, and the characteristics of luminescence of this at least one light source compare with all the other light sources of illuminator can be different.The characteristics of luminescence can also for example comprise around the emissive porwer of light source or spatial-intensity and changing, and the characteristics of luminescence of this at least one light source compare with all the other light sources of illuminator can be different.

According to the effect of illuminator of the present invention be to use luminescent material stride the specific distribution of remote phosphor and/or diffusing structure and/or scattering material stride the specific distribution of scattering layer compensate at least one light source aspect the emission characteristics with respect to the difference of all the other light sources.This compensation produces following benefit: can omit any stepping (binning) of light source and can improve the uniformity of light that the light output window of illuminator is launched.When using the array of source of light emitting diode matrix and so on for example, single source has the characteristics of luminescence of variation usually.Usually, these variations are to cause owing to the production in the production process of single source changes.For improving the uniformity in the light emitting diode matrix, use stepping usually.In this type of was arranged, the light emitting diode of determining the emission characteristics of light emitting diode and only having a substantially the same emission characteristics just was combined into single array.Though stepping provides from the relative good homogeneous of the light of array of source emission, the logistics that the stepping process is relatively costly and needs are good.In illuminator according to the present invention, at contiguous array of source place, this illuminator also comprises remote phosphor, and this remote phosphor comprises luminescent material and/or scattering layer, and this scattering layer comprises diffusing structure and/or scattering material.Stride the distribution that scattering layer is striden in the distribution of remote phosphor and/or diffusing structure and/or scattering material by adjusting luminescent material, can compensate the emission that the emission characteristics owing to the variation of at least one light source in the array of source causes at least in part and change, omit needs simultaneously stepping thereby generate from the higher relatively uniformity of the light of the light output window emission of illuminator.

In the known illumination system of US 2006/0268537, will contain the array and the phosphor film combination of three light sources.The concentration of the phosphor microparticle in the phosphor film so changes: make that the concentration of phosphor microparticle increases in away from the part of light source.All identical and this change in concentration pattern is the center with the optical axis of the light source of this known illumination system to change in concentration pattern in the known illumination system for each light source in the array of source.Though the change in concentration of being put down in writing can be supported luminous relatively uniformly, because the variation of the emission characteristics aspect of light source still exists uniformity to change.It seems still needs stepping to improve luminous uniformity from this known illumination system.Even worse: stepping not only comprises the color and/or the Strength Changes of the light source that should mate in array now, and for each light source, also should mate in the angle variations in light aspect intensity and the color two.Especially, because the predetermined concentration changing pattern that in the known phosphors film, provides, will cause that all the big relatively uniformity that still is present in this known illumination system changes to any departing from of the angle variations in light of the expection of the light source in the known illumination system.Therefore, not only the intensity of the light source in the array of this known illumination system of US 2006/0268537 and/or color should be mated, and the angle variations in light of single source should be matched with the angle variations in light that is used to design the expection that predetermined concentration changes.Therefore, by in the phosphor film as shown in this known illumination system of US 2006/0268537, applying predetermined change in concentration, be used to generate stepping process that uniformly light-emitting distributes because the requirement (being that they should mate) of light source is become stricter and becomes much more difficult, and it is more expensive to become thus.In addition, apply phosphor microparticle equably owing to can not simply extend across phosphor film, therefore employed phosphor film production is got up relatively costly.

In illuminator according to the present invention, remote phosphor and/or scattering layer are arranged to the difference of compensate for emission characteristic aspect at least in part.Remote phosphor comprises that at least a portion that is arranged to light that light source is launched is converted to the luminescent material of the light of different colours.Generate distribution that luminescent material strides remote phosphor difference with the characteristics of luminescence aspect that compensates this at least one light source at least in part.Scattering layer comprises the diffusing structure and/or the scattering material of at least a portion that is arranged to the light that scattering light source launches.Generate distribution that diffusing structure and/or scattering material stride scattering layer difference with the characteristics of luminescence aspect that compensates this at least one light source at least in part.Be optimized at the specific light source array according to remote phosphor of the present invention and/or scattering layer, and usually at each array of source and difference, and also depend on the order of the light source in the array of source usually.Therefore, may be suitable though be used to produce with cost in order to the known phosphors film that produces US 2006/0268537 according to the cost of remote phosphor of the present invention and/or scattering layer, yet now, because cause according to remote phosphor of the present invention and/or scattering layer, no longer need light source is carried out stepping or otherwise selects (making the total system cost reduce), simultaneously because the distribution of luminescent material and/or diffusing structure and/or scattering layer customizes at the current light source array, so resulting uniformity of light from emitted is far better.

In the embodiment of illuminator, the characteristics of luminescence comprises any in the following: light intensity, photochromic, angle emission profile.The variation of these characteristics of luminescence aspects causes that usually the uniformity in the illuminator changes.

In the embodiment of illuminator, the distribution of luminescent material comprises that the localized variation of luminescent material is so that compensate the difference of characteristics of luminescence aspect at least in part, and/or wherein the distribution of diffusing structure and/or scattering material comprise localized variation so that compensate the difference of characteristics of luminescence aspect at least in part, localized variation comprises the density that changes the luminescent material stride remote phosphor, and/or change the density of the diffusing structure and/or the scattering material of striding scattering layer.The variable density of luminescent material may be enough to compensate any variation (for example, when the blue basically light time of light emitted) of the characteristics of luminescence aspect of at least one light source.In this type of embodiment, luminescent material is arranged to absorb the part of the blue light of being launched and the blue light that is absorbed is converted to for example gold-tinted, and this gold-tinted is producing the light of white basically with from all the other blue light of light source the time.This type of emitted is essentially the light of white, wherein can compensate the intensity of the blue light of being launched and/or the angle of color by the density that the luminescent material of remote phosphor is striden in change and change.Alternatively or additionally, can have such scattering layer: wherein the density of diffusing structure and/or scattering material is striden scattering layer and is changed to change emissive porwer partly.Localized variation can comprise the thickness that changes the luminescent material stride remote phosphor, and/or change and stride the diffusing structure of scattering layer and/or the thickness of scattering material.Moreover, in the example that has basically luminescent material uniformly formerly, can used thickness change any variation of the emission characteristics aspect that compensates at least one light source.Alternatively or additionally, can have such scattering layer: wherein the varied in thickness of diffusing structure and/or scattering material is to change emissive porwer partly.Localized variation can also comprise the different phosphor materials that change in the luminescent material stride remote phosphor and/or the mixing of scattering material.

Luminescent material can be used to generate the light of required color, for example has the white light of specific colour temperature.Diffusing structure and/or scattering material can be used for changing partly the light intensity of being launched.In this type of embodiment, the mixing of luminescent material and/or diffusing structure and/or scattering material must be suitable for guaranteeing that the light of being launched of striding the light output window comprises the gentle intensity distributions of required special color.The density that changes diffusing structure and/or scattering material causes that the part of emission characteristics changes.The localized variation of luminescent material can comprise and changes the scattering stride remote phosphor and/or reflectivity properties so that change length by the light path of remote phosphor.By adjusting light path partly, can adjust the degree of light conversion, thereby change emission characteristics partly by remote phosphor.

In the embodiment of illuminator, the combination of array of source and remote phosphor and/or scattering layer is arranged to and generates the even light distribution basically of striding the light output window.As previously mentioned, generally speaking, the remote phosphor and/or the scattering layer that are designed for the emission characteristics of at least one light source in the compensatory light array are exclusively used in this specific light source array, and can not generate good homogeneous usually when being used to the Different Light array.Just in this point, select the combination of array of source and remote phosphor and/or scattering layer to generate even light distribution basically.

In the embodiment of illuminator, remote phosphor and/or scattering layer can be inner mobile so that optimize the photodistributed uniformity of striding the light output window in illuminator.Any inaccuracy when remote phosphor and/or scattering layer can be moved, can compensate the distribution that produces luminescent material and/or diffusing structure and/or scattering material in that illuminator is inner.Similarly, can compensate remote phosphor and/or scattering layer location with respect to array of source.For example, when increase between light output window and remote phosphor and/or the scattering layer apart from the time, can be by before launching light, light being mixed to come any remaining inhomogeneities in the light that balance remote phosphor and/or scattering layer launch via the light output window.When illuminator was for example used in back light unit, the number of light sources in the array of source can be relatively large.At this, the located lateral of remote phosphor and/or scattering layer may be crucial, and thus by being arranged essentially parallel to mobile in a lateral direction remote phosphor of array of source and/or scattering layer, can realize inhomogeneity optimization.

In the embodiment of illuminator, illuminator comprises a plurality of remote phosphor, each remote phosphor all is disposed between array of source and the light output window, and each remote phosphor comprises specific part that is used to absorb the light that light source launches and the specific luminescent material of launching the light of particular color.Luminescent material can for example comprise three kinds of different phosphor materials, and first kind of emission is essentially red light, second kind of emission is essentially green light and the third emission and is essentially blue light.By for example adjusting each the thickness in three kinds of phosphor materials respectively, can revise local color and change.

In the embodiment of illuminator, a plurality of remote phosphor are applied on the single carrier material.This type of layout will be simplified the manufacturing of illuminator, this is because generate on single carrier material after this a plurality of remote phosphor, makes the combination generation of array of source and these a plurality of phosphor layers stride the relative higher uniformity of light output window thereby only need will this single carrier material to be positioned at illuminator inside.In addition, scattering layer can also be combined on the single carrier material or be integrated in the single carrier material manufacturing with further simplification illuminator.

In the embodiment of illuminator, luminescent material is the printed luminescent material that is used for generating via typography the distribution stride remote phosphor, and/or wherein scattering material be the printed scattering material that is used for generating the distribution of striding scattering layer via typography.The benefit of present embodiment is that it has simplified luminescent material and striden the distribution of remote phosphor and the generation of the distribution that scattering material is striden scattering layer.Any typography all is suitable for.Aborning, can in illuminator, not exist under the situation of remote phosphor and/or scattering layer array of source is attached to illuminator.The uniformity of measuring the light output window place of illuminator makes it possible to calculate the local required luminescent material and/or density, thickness and/or the specific blend of scattering material.Can be data with the information translation that this calculated, these data can be used for the luminescent material of printshop need and/or the distribution of scattering material by printing equipment.For measured color and Strength Changes being converted to the localized variation of required luminescent material and/or scattering material, for example can use look-up table or algorithm, circulation, modeling etc.By measuring with the constant structure in space with the uniformity of array of source and the illuminator that merges with reference to remote phosphor or with reference to scattering layer and need to determine the spatial offset revised, can improve determining that required luminescent material and/or scattering material distribute.

In the embodiment of illuminator, array of source comprises light emitting diode matrix.In the context of present patent application, at contiguous light-emitting component place, light source can also comprise secondary optics, such as lens and diffuser.These secondary optics may cause characteristics of luminescence difference, and this can compensate by the correct distribution of luminescent material and/or diffusing structure and/or scattering material.

In the embodiment of illuminator, the light emitted in the array of source has the light of the centre wavelength in the scope between 400 nanometers and 490 nanometers.Light with centre wavelength in the scope between 400 nanometers and the 490 nanometers blue light that is otherwise known as.Use the benefit of the light time that blue light launches as array of source to be that this light is visible to the mankind and thereby can directly be mixed into and need conversion in the output of illuminator.Use luminescent material with light from a kind of color conversion for any conversion of another kind of color since changing related Stokes shift (Stokes-shift) introduced some energy loss.Use the light source of emission blue light to reduce the needs of changing from all light of light source, this has improved the efficient of illuminator.In addition, blueness is one of primary colors, its can be used for such as red and green or other former mixture of colours such as yellow to obtain white light.For example, when luminescent material absorbs the part of the blue light that light source launches and launches gold-tinted, and when the amount of correctly selecting luminescent material so that during the remainder of the part of converting blue light and transmit blue, for example can be white (because combination of the gold-tinted of the remainder of blue light and other luminescent material emission) basically from the light of emitted.Further benefit when using the light source of emission blue light is, having omitted in the illuminator in the use to ultraviolet light, still can produce the light of any color basically.Usually, ultraviolet light is used for the light source through phosphor converted, and this is because a lot of phosphor material absorbs ultraviolet light and this ultraviolet light that is absorbed is converted to visible light.Yet harmful and therefore ultraviolet light may should illuminated system not launched.Just in this point, when the light emitted ultraviolet light, may need to block any remaining ultraviolet light and make it when the light emitted blue light, then can not omit ultraviolet filter from the ultraviolet filter of emitted.In addition, ultraviolet light may react with the other materials such as plastics in the illuminator and may damage these other materials.

In this paper context, the light of particular color or specific wavelength generally includes the light with predetermined spectrum.Predetermined spectrum can for example comprise the primary colors that has around the specific bandwidth of specific wavelength, perhaps can for example comprise a plurality of primary colors.Primitive color light for example comprises redness, green, blueness, yellow, amber and carmine light.The light of particular color can also comprise the mixing of primary colors, such as blue and amber mixing, and perhaps blue, yellow and red mixing.By selecting the particular combinations of for example red, green and blue light, illuminator can generate every kind of color basically, comprises white.Can also use other combinations of primary colors in illuminator, this makes it possible to generate every kind of color basically, for example redness, green, blueness, cyan and yellow.The primary colors number that is used for illuminator can change.

Method according to the characteristics of luminescence of revising at least one light source in the illuminator at least in part of sixth aspect present invention comprises the steps:

Before applying remote phosphor and/or scattering layer, determine to stride the variation of emission characteristics of the light output window of illuminator,

Be identified for compensating the distribution of required luminescent material of the difference of characteristics of luminescence aspect of at least one light source and/or diffusing structure and/or scattering material,

Thereby apply luminescent material so that generate the difference that remote phosphor compensates characteristics of luminescence aspect at least in part according to determined distribution, thereby and/or apply diffusing structure and/or scattering material so that generate the difference that scattering layer compensates characteristics of luminescence aspect at least in part according to determined distribution, and

Apply remote phosphor and/or scattering layer to illuminator.

Description of drawings

According to described embodiment hereinafter, these and other aspects of the present invention will become obviously, and will illustrate these and other aspects of the present invention with reference to described embodiment hereinafter.

In the accompanying drawings:

Figure 1A, Figure 1B and Fig. 1 C show schematic sectional view and the vertical view according to illuminator of the present invention,

Fig. 2 shows the vertical view according to remote phosphor of the present invention and/or scattering layer,

Fig. 3 shows the lighting apparatus that comprises according to illuminator of the present invention, and

Fig. 4 show according to of the present invention, comprise the schematic sectional view of illuminator as the display device of back light unit.

Accompanying drawing is exemplifying fully, and is not to draw in proportion.Especially, for clarity sake, some size is amplified emphatically.Like among the figure is represented with identical reference number as much as possible.

The specific embodiment

Figure 1A, Figure 1B and Fig. 1 C show schematic sectional view and the vertical view according to

illuminator

10,12 of the present invention.Illuminator 10,12 comprise array of source 20 and be arranged in array of source 20 and light output window 40 between remote phosphor 30; 32,34 and/or scattering layer 32.

Illuminator

10,12 light of being launched are via 40 emissions of light output window.At least one light source 22 in the array of source 20 comprises the characteristics of luminescence that is different from the other light sources in the array of source 20.This different characteristics of luminescence may cause this at least one light source 22 to have lower intensity with respect to the other light sources in the array 20, and perhaps this different angle light that may cause this at least one light source 22 to be launched distributes.The different characteristics of luminescences can also comprise the difference of the color of the light of being launched about this at least one light source 22, for example, the centre wavelength of the spectrum that this at least one light source is launched is with respect to the other light sources in the array 20 displacement, and perhaps the spectral contribution of the light that other light sources is launched in the spectral contribution of the light launched of this at least one light source 22 and the array 20 is compared different.This difference of characteristics of luminescence aspect causes the uneven illumination of light output window 40 usually.This inhomogeneities for example may be when colour inhomogeneous during other light sources in the color deviation array 20 of the light that this at least one light source 22 is launched, and perhaps for example can be that the light intensity launched when this at least one light source 22 and/or angle distribute and depart from other light sources is launched in the array 20 light intensity and/or the angle intensity non-uniformity when distributing.

Remote phosphor 30; 32,34 be arranged to usually with array of source 20 and have certain distance to arrange to obtain remote phosphors.Remote phosphor 30; 32,34 comprise the

luminescent material

52,54 that at least a portion of

light source

20,22 light of being launched is converted to the light of different colours.

Luminescent material

52,54 is striden remote phosphor 30; 32,34 and distribute.The distribution of

luminescent material

52,54 is chosen as makes the difference of characteristics of luminescence aspect of this at least one light source 22 obtain compensation to small part.

Alternatively and/or additionally, can between array of source 20 and light output window 40, arrange scattering layer 32.In current example, the layer that has only the layer that indicates with reference number 32 to be denoted as to comprise diffusing structure 52 and/or scattering material 52 also thereby serves as scattering layer 32.Yet, also can represent scattering layer or can comprise diffusing structure 52 and/or scattering material 52 with other layers that

reference number

30 and 34 indicates.In addition, may there be the mixing of

luminescent material

52,54 and scattering material 52 in the some or single layer that in following examples, indicates.Diffusing structure 52 can be to be present in light is carried out any structure on the layer of scattering, for example cut, indenture, point etc.Scattering material 52 representative can be dispersed in the carrier material (it is transparent material normally) and material that can scatter incident light.At contiguous scattering material 52 places, carrier material may for example also comprise the luminescent material 54 that is dispersed in the carrier material and thereby generate the remote phosphors and the scattering layer of combination.Diffusing structure 52 and/or scattering material 52 are striden scattering layer 32 and are distributed.The distribution of diffusing structure 52 and/or scattering material 52 is chosen as makes the difference of characteristics of luminescence aspect of this at least one light source 22 obtain compensation to small part.

Difference for compensation characteristics of luminescence aspect can change

luminescent material

52,54 and stride remote phosphor 30; 32,34 density and/or diffusing structure and/or scattering material are striden the density of scattering layer 32.Alternatively, can change

luminescent material

52,54 and stride remote phosphor 30; 32,34 thickness and/or diffusing structure and/or scattering material are striden the thickness of scattering layer 32, with the difference of compensation characteristics of luminescence aspect.Change to the thickness of

luminescent material

52,54 and/or scattering material 52 can for example use the

luminescent material

52,54 and/or the scattering material 52 of laser printing or deposit slightly of ink jet printing technology or printing to finish by having.For example, when in remote phosphor 30; 32,34 and/or scattering layer 32 non-existent situations under when the intensity at measuring light output window 40 places or distribution of color, measure by at least one the light source 22 caused variation in the array of source 20.According to these measurements and according to available

luminescent material

52,54 and/or scattering material 52, need can determine remote phosphor 30; 32,34 and/or scattering layer 32 on

luminescent material

52,54 and/or which kind of of scattering material 52 change this difference characteristics of luminescence of coming at least one light source 22 in the compensated array 20 at least in part.To required variation this determine to use available

luminescent material

52,54 absorption, excite with emission spectrum and finish, the effect that perhaps can use which variation of indication can improve uniformity and this variation is and so on that look-up table is finished.Alternatively, the mixing of the different phosphor materials in the

luminescent material

52,54 can be striden remote phosphor 30; 32,34 and change.Usually,

luminescent material

52,54 comprises the mixing of different phosphor materials, and every kind of specific phosphors material absorbs the specific part of the light that light source 20 launched and launches the light of particular color.By adjusting this mixing, can compensate the localized variation that the change owing to the characteristics of luminescence aspect of light source causes at least in part with this.

Print system can for example comprise three different printing sources that are used to print three kinds of different

luminescent materials

52,54, for example red, green and blue variation the with compensation.Adjust scattering material 52 thereby print system can also comprise the 4th printing source that scattering material 52 is provided and stride the density compensation intensity variation of scattering layer 32.Whole four the printing sources of printing can generate and comprise both single substrates of

luminescent material

52,54 and scattering material 52 on single substrate 60.Alternatively, diffusing structure 52 can be the preprinted via hole (for example via the local laser ablation to the surface of substrate 60) on the substrate 60, and with after-applied

luminescent material

52,54.

Figure 1A shows along the schematic sectional view of the line AA as shown in Figure 1B.Illuminator 10 shown in Figure 1A comprises remote phosphor 30, this remote phosphor 30 be arranged to and array of source 20 certain distance is arranged and be disposed in array of source 20 and light output window 40 between.In this cross section, have one of in the light source 22 with array 20 in other light sources compare the different characteristics of luminescences, this indicates with different gray shades.As previously mentioned, the difference of characteristics of luminescence aspect can be color, angle distribution of color, intensity and angle intensity distributions, and it all schematically indicates with different gray shades in Figure 1A.Illuminator 10 generally includes mixed light chamber 42, in the mixed light chamber 42 medium-long range phosphor layers 30 for example can be on direction perpendicular to light output window 40 mobile (not shown).Remote phosphor 30 is moved away from the uniformity that light output window 40 can strengthen light output window 40 places, and this is because from the light of remote phosphor 30 emission mixing the part between remote phosphor 30 and the light output window 40 in mixed light chamber 42.Alternatively, remote phosphor 30 can move any misalignment that causes with the manufacturing tolerance of for example revising owing to illuminator 10 on the direction that is parallel to remote phosphor 30.

Alternatively, as previously mentioned, the layer that indicates with reference number 30 can also comprise scattering material 52 (not shown) or can be scattering layer 30.

Figure 1B shows the schematic plan of illuminator 10 when having removed remote phosphor 30.In this configuration, light intensity and/or change in color that can measuring light output window 40 places, its which variation that can be used to determine to need

luminescent material

52,54 and/or diffusing structure 52 and/or scattering material 52 be so that compensate the difference of the characteristics of luminescence aspect of at least one light source 22 at least in part.In the embodiment shown in Figure 1B, exist to have five light sources 22 comparing the different characteristics of luminescences with all the other light sources 20.In the illustrative arrangement shown in Figure 1B, all light sources that depart from 22 all use identical gray shade to indicate.Yet indivedual characteristics of luminescences of these light sources that depart from 22 differ from one another on can be aspect the characteristics of luminescence any.

Measured current light source array 20 after the uniformity at light output window 40 places, can generate remote phosphor 30 (referring to Fig. 2), for example, use known printing technology (such as laser printing, ink jet printing or any other printing technology) to come printed remote phosphor layer 30.Alternatively or additionally, can generate scattering layer 32 or can add scattering material 52 to remote phosphor 30.For this reason, measured difference should be converted to the digital information that can be used for the printing machine (not shown) or can be used for selected printing technology.In addition, should make the suspension of phosphor suspension and/or scattering material 52 have proper viscosity, particle size and the stability that is suitable for selected printing technology.Can also generate remote phosphor 30, the plastic material extruding (not shown) that for example will contain phosphor is for having the plate of (preferably partly) adjustable thickness.

Fig. 1 C shows the schematic sectional view according to the alternative of illuminator 12 of the present invention.Similarly, array of source 20 is rendered as and has at least one light source 22 that its characteristics of luminescence departs from all the other light sources in the array 20.Similarly, between array of source 20 and light output window 40, arrange remote phosphor 32,34.Now, remote phosphor is made of different

luminescent material

52,54, and these luminescent materials are applied to carrier material 60 in the

independent layer

32,34 of luminescent material 52,54.The

layer

32,34 of these separation can be applied directly to top of each other as shown in the schematically showing of Fig. 1 C, perhaps can alternatively be applied on the individual carriers material (not shown) each carrier material even can for example individually move in illuminator 12.As among Fig. 1 C as seen, the thickness of

luminescent material

52,54 for example can be adjusted and even can be arranged in the individual layer luminescent material 32,33 and change, with the difference between the characteristics of luminescence that compensates Different Light 20 at least in part.

Alternatively or additionally, the layer with reference number 32 can be the scattering layer 32 that comprises diffusing structure 52 and/or scattering material 52.With luminescent layer 54 combinations, can obtain the compensation aspect color and intensity two.As previously mentioned, luminescent layer 34 can also comprise that scattering material 52 and scattering layer 32 can also comprise luminescent material 54.

Fig. 2 shows the vertical view according to remote phosphor 30 of the present invention and/or scattering layer 32.For the purpose of reference, with dashed lines has indicated the position of light source in array of source 20, has also indicated the position of at least one light source 22 of the characteristics of luminescence with the remainder that is different from array of source 20.Can see that

luminescent material

52,54 and/or diffusing structure 52 and/or scattering material 52 stride remote phosphor 30 and/or scattering layer 32 changes to compensate the difference of characteristics of luminescence aspect at least in part.For clarity sake, these variations indicate by the gray shade that changes equally.Yet this variation can also comprise change color.Variation shown in Fig. 2 can be variable density or the varied in thickness as shown in Fig. 1 C or both combination as shown in Figure 1A.

Fig. 3 shows and comprises schematically showing according to the lighting apparatus 100 of

illuminator

10,12 of the present invention.Lighting apparatus 100 is complete lighting units, for example is used for office, shop, dwelling house, perhaps for example with the lighting unit that acts on street lamp.Thereby colour rendering index preferably should highly as far as possible make the illumination of 100 pairs of object (not shown) of lighting apparatus produce the true reappearance to object color.This high color rendering index (CRI) can obtain by using the broad mixing of for example launching the different

luminescent materials

52,54 of the light that covers whole visible electromagnetic spectrum basically together.

Fig. 4 shows and comprises schematically showing according to the display device 300 of

illuminator

10,12 of the present invention.Display device 300 generally includes non-emissivity display 310, and such as array of lc cells, by changing the light transmittance of unit in the array of lc cells, it can produce image on display 300.Illuminator the 10, the 12nd, the part of back light unit 200.

Should be noted that the foregoing description explanation and unrestricted the present invention, and under the situation of the scope that does not break away from claims, those skilled in the art can design a lot of alternatives.

In claims, place any reference number between the bracket should not be interpreted as claim is limited.Verb " comprises " and the use of version is not got rid of in the claim to be set forth those elements or the element beyond the step or the existence of step.The existence that article " " before the element or " a kind of " do not get rid of a plurality of these class components.The present invention can realize by means of the hardware that comprises some different elements.In enumerating the equipment claim of some devices, several in these devices can be embodied by same hardware.The simple fact of having put down in writing certain measures in different mutually dependent claims does not represent to utilize the combination of these measures.

Claims

1. an illuminator (10,12) comprises array of source (20) and is arranged in described array of source (20) and is used for emission from the remote phosphor (30 between the light output window (40) of the light of described light source (20); 32,34) and/or scattering layer (32),

At least one light source (22) in the described array of source (20) comprises the characteristics of luminescence that is different from the other light sources in the described array of source (20),

Described remote phosphor (30; 32,34) and/or scattering layer (32) be arranged to described array of source (20) and certain distance arranged, described remote phosphor (30; 32,34) comprise that at least a portion that is arranged to light that described light source (20,22) is launched is converted to the luminescent material (52,54) of the light of different colours, described scattering layer (32) comprises the diffusing structure (52) and/or the scattering material (52) of at least a portion that is arranged to the light that the described light source of scattering (20,22) launched, and described luminescent material (52,54) is striden described remote phosphor (30; 32,34) distribution and described diffusing structure (52) and/or scattering material (52) are striden described scattering layer (32) distribution so that compensate the difference of the characteristics of luminescence aspect of described at least one light source (22) at least in part.

2. illuminator according to claim 1 (10,12), the wherein said characteristics of luminescence comprise any in the following: light intensity, photochromic, angle emission profile.

3. illuminator according to claim 1 and 2 (10,12), the described distribution of wherein said luminescent material (52,54) comprises that the localized variation of described luminescent material (52,54) is so that compensate the described difference of characteristics of luminescence aspect at least in part, and/or the described distribution of wherein said diffusing structure (52) and/or scattering material (52) comprises localized variation so that compensate the described difference of characteristics of luminescence aspect at least in part, described localized variation comprises any in the following:

Change and stride described remote phosphor (30; The density of described luminescent material 32,34) (52,54), and/or change the density of described diffusing structure (52) and/or the scattering material (52) stride described scattering layer (32);

Change and stride described remote phosphor (30; The thickness of described luminescent material 32,34) (52,54), and/or change and to stride the described diffusing structure (52) of described scattering layer (32) and/or the thickness of scattering material (52);

Change and stride described remote phosphor (30; 32, the different phosphor materials in the described luminescent material 34) (52,54) and/or the mixing of scattering material (52), described luminescent material (52,54) comprises the mixing of different phosphor materials and/or scattering material (52), and each specific phosphors material absorbs the specific part of the light that described light source (20) launched and launches the light of particular color;

Change and stride described remote phosphor (30; 32, scattering 34) and/or reflectivity properties are so that change by described remote phosphor (30; The length of light path 32,34).

4. according to claim 1,2 or 3 described illuminators (10,12), wherein said array of source (20) and described remote phosphor (30; 32,34) and/or the combination of scattering layer (32) be arranged to and generate the even light distribution basically stride described smooth output window (40).

5. illuminator according to claim 4 (10,12), wherein said remote phosphor (30; 32,34) and/or described scattering layer (32) can move so that optimize the described photodistributed uniformity of striding described smooth output window (40) in that described illuminator (10,12) is inner.

6. according to claim 1,2 or 3 described illuminators (10,12), wherein said illuminator (10,12) comprises a plurality of remote phosphor (32,34), each remote phosphor (32,34) is arranged between described array of source (20) and the described smooth output window (40), each remote phosphor (32,34) comprises specific part that is used to absorb the light that described light source (20) launched and the specific luminescent material (52,54) of launching the light of particular color.

7. illuminator according to claim 6 (10,12), wherein said a plurality of remote phosphor (32,34) are applied on the single carrier material (60).

8. according to each described illuminator (10,12) in the aforementioned claim, wherein said luminescent material (52,54) is to be used for striding described remote phosphor (30 via the typography generation; The printable luminescent material of described distribution 32,34) (52,54), and/or wherein said scattering material (52) is the printable scattering material (52) that is used for generating via described typography the described distribution of striding described scattering layer (52).

9. according to each described illuminator (10,12) in the aforementioned claim, wherein said array of source (20) comprises light emitting diode (20) array.

10. according to each described illuminator (10,12) in the aforementioned claim, the described light source (20) in the wherein said array of source (20) is launched the light with centre wavelength in the scope between 400 nanometers and 490 nanometers.

11. remote phosphor (30; 32,34), be configured to be arranged as and certain distance arranged, described remote phosphor (30 according to the described array of source (20) of each illuminator (10,12) in the claim 1 to 10; 32,34) comprise that at least a portion that is arranged to light that described light source (20) is launched is converted to the luminescent material (52,54) of the light of different colours, described luminescent material (52,54) is striden described remote phosphor (30; 32,34) distribute so that compensate the difference of the characteristics of luminescence aspect of described at least one light source (22).

12. scattering layer (32), be configured to be arranged as and certain distance arranged according to the described array of source (20) of each illuminator (10,12) in the claim 1 to 10, described scattering layer (32) comprises the diffusing structure (52) and/or the scattering material (52) of at least a portion that is arranged to the light that the described light source of scattering (20) launched, and described diffusing structure (52) and/or scattering material (52) are striden described scattering layer (32) and distributed so that compensate the difference of the characteristics of luminescence aspect of described at least one light source (22).

13. lighting apparatus (100) comprises according to each described illuminator (10,12) in the claim 1 to 10.

14. display device (300) comprises according to each described illuminator (10,12) in the claim 1 to 10.

15. revise the method for the characteristics of luminescence of at least one light source (22) in the illuminator (10,12) at least in part, described illuminator (10,12) comprises array of source (20) and is arranged in described array of source (20) and is used for emission from the remote phosphor (30 between the light output window (40) of the light of described light source (20); 32,34) and/or scattering layer (32), described at least one light source (22) comprises the characteristics of luminescence that is different from the other light sources in the described array of source (20), and wherein said method comprises the steps:

Applying described remote phosphor (30; 32,34) and/or scattering layer (32) before, determine to stride the variation of emission characteristics of the described smooth output window (40) of described illuminator (10,12);

Determine the distribution of required luminescent material (52,54) of the difference of characteristics of luminescence aspect of described at least one light source of compensation (22) and/or diffusing structure (52) and/or scattering material (52);

Apply described luminescent material (52,54) so that generate described remote phosphor (30 according to determined distribution; 32,34) thus compensate the described difference of characteristics of luminescence aspect at least in part, and/or according to determined distribution apply described diffusing structure (52) and/or scattering material (52) in case generate described scattering layer (32) thus compensate the described difference of characteristics of luminescence aspect at least in part; And

Apply described remote phosphor (30 to described illuminator (10,12); 32,34) and/or described scattering layer (32).